Linux Kernel Nexthop Data-Race Vulnerability

A data-race vulnerability has been identified in the Linux kernel's nexthop component. The issue arises because the 'nexthop_compat_mode' variable can be changed concurrently while it is being read. This vulnerability affects several versions of the Linux kernel. To address this issue, the 'READ_ONCE()' function needs to be added to the readers of 'nexthop_compat_mode' to ensure safe access.

Impact

Exploitation of this vulnerability can lead to data inconsistency issues, where concurrent reads and writes to 'nexthop_compat_mode' could cause unexpected behavior in the nexthop functionality.